Overview
Comprehensive Description
Biology
Nocturnally active; inhabits cracks and crevices during the day. Feeds on small mobile benthic organisms (Ref. 26966), by drifting up to its prey and swallowing it whole with a sideways snap of the large extensible mouth (Ref. 26966).
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Robins, C.R., R.M. Bailey, C.E. Bond, J.R. Brooker, E.A. Lachner, R.N. Lea and W.B. Scott 1991 World fishes important to North Americans. Exclusive of species from the continental waters of the United States and Canada. Am. Fish. Soc. Spec. Publ. (21):243 p. (Ref. 4537)
http://www.fishbase.org/references/FBRefSummary.php?id=4537&speccode=1255
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Distribution
Distribution
New Zealand Exclusive Economic Zone
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Gordon, D. (Ed.) (2009). New Zealand Inventory of Biodiversity. Volume One: Kingdom Animalia. 584 pp
http://www.marinespecies.org/porifera/porifera.php?p=sourcedetails&id=145244
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Southwestern Pacific: Restricted to New Zealand.
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Gomon, M.F. 2004 Two new species of roughy (Trachichthyidae: Optivus) from coastal waters of southern Australia. Rec. Aust. Mus. 56:173-178. (Ref. 76814)
http://www.fishbase.org/references/FBRefSummary.php?id=76814&speccode=12004
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Physical Description
Size
Max. size
72.0 cm SL (male/unsexed; (Ref. 31667))
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Anonymous 1998 Fish collection database of the Bernice P. Bishop Museum (BPBM). Bishop Museum, 1525 Bernice Street, Honolulu, Hawai`I, 96817-0916 USA. (Ref. 31667)
http://www.fishbase.org/references/FBRefSummary.php?id=31667&speccode=12004
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Ecology
Habitat
Environment
reef-associated; marine; depth range 15 - 35 m (Ref. 28787)
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Francis, M.P., R.V. Grace and C.D. Paulin 1987 Coastal fishes of the Kermadec Islands. N.Z. J. Mar. Freshwat. Res. 21(1):1-13. (Ref. 28787)
http://www.fishbase.org/references/FBRefSummary.php?id=28787&speccode=12004
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Depth range based on 4 specimens in 1 taxon.
Environmental ranges
Depth range (m): 2 - 7
Graphical representation
Depth range (m): 2 - 7
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.
Environmental ranges
Depth range (m): 2 - 7
Graphical representation
Depth range (m): 2 - 7
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.
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Trophic Strategy
Is active at night; stays in cracks and crevices during the day. Feeds on small mobile benthic organisms (Ref. 26966), by drifting up to its prey and swallowing it whole with a sideways snap of the large extensible mouth (Ref. 26966).
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Russell, B.C. 1983 The food and feeding habits of rocky reef fish of north-eastern New Zealand. N.Z. J. Mar. Freshwat. Res. 17(2):121-145. (Ref. 26966)
http://www.fishbase.org/references/FBRefSummary.php?id=26966&speccode=47003
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Conservation
Threats
Not Evaluated
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IUCN 2006 2006 IUCN red list of threatened species. www.iucnredlist.org. Downloaded July 2006.
http://www.fishbase.org/references/FBRefSummary.php?id=57073
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Relevance to Humans and Ecosystems
Benefits
Wikipedia
Slender roughy
The slender roughy, Optivus elongatus, is a small slimehead of the family (Trachichthyidae), the only member of the genus Optivus, found in the western Pacific Ocean around Australia and New Zealand at depths of between 1 and 100 m. Its length is up to about 10 cm.
References
- Froese, Rainer, and Daniel Pauly, eds. (2006). "Optivus elongatus" in FishBase. May 2006 version.
- Tony Ayling & Geoffrey Cox, Collins Guide to the Sea Fishes of New Zealand, (William Collins Publishers Ltd, Auckland, New Zealand 1982) ISBN 0-00-216987-8
Unreviewed
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